CN113701391B - Regenerative device and operation method - Google Patents

Abstract

A regenerative device, comprising a regenerative unit, which includes a low temperature cavity, a low temperature heat exchanger, a high temperature heat exchanger and a high temperature cavity connected in sequence, the cold working medium of the low temperature cavity flows out through the low temperature heat exchanger, and the high temperature cavity flows out. The hot working medium flows out through the high temperature heat exchanger, and the regenerative unit also includes a first working medium inflow channel parallel to the high temperature heat exchanger, and the cold working medium from the low temperature heat exchanger flows into the high temperature through the first working medium inflow channel. and/or, further comprising a second working medium inflow channel parallel to the low temperature heat exchanger, and the hot working medium from the high temperature heat exchanger flows into the low temperature cavity through the second working medium inflow channel. Its operation method: when the working medium flows from the low temperature cavity to the high temperature cavity, the cold working medium flows into the high temperature cavity through the low temperature heat exchanger and the first working medium in turn; when the working medium flows from the high temperature cavity to the low temperature cavity, the hot working medium flows into the high temperature cavity. It flows into the low temperature chamber through the high temperature heat exchanger and the second working fluid inflow channel in sequence. The invention has the advantages of temperature glide endothermic or exothermic heat, large temperature glide range and high efficiency.

Description

A kind of regenerative device and operation method

technical field

The invention relates to the fields of refrigerators and heat pumps, and in particular, to a regenerative device and an operation method.

Background technique

The Carnot cycle (see Figure 1a) has the theoretical maximum efficiency when the temperature of the low temperature heat source and the high temperature heat source are constant. But in the case of low temperature heat source or high temperature heat source temperature change, the Carnot cycle is not the most ideal cycle, the most ideal cycle is the Lorentz cycle (see Figure 1b). A Lorentz cycle by definition is an inversely reversible cycle consisting of two polytropic processes and two isentropic processes, which reduces irreversible losses within the heat exchanger by means of temperature glide properties during endothermic or exothermic processes, Thereby improving the thermal performance of the circulation system. At present, the industry has proposed a non-azeotropic mixed working fluid solution, but there are some problems, such as the small temperature glide of the non-azeotropic mixed working fluid, and the change of the composition of the mixed working fluid caused by the leakage of the refrigerant.

The theoretical Stirling cycle is composed of two isothermal processes and two constant volume processes (see 1-2-3-4 in Figure 1c). However, in the actual Stirling refrigeration device, because the isothermal process is difficult to achieve, the Stirling cycle is composed of two approximately adiabatic processes and two constant volume processes (see 1-2'-3'-4 in Figure 1c). In the process of adiabatic compression, the temperature of the working fluid will be higher than the temperature of the high-temperature heat source, while the temperature of the working fluid during the adiabatic expansion process will be lower than the temperature of the low-temperature heat source. Because the heat exchanger in the current Stirling refrigeration unit is basically close to the isothermal heat exchanger, it is difficult to carry out The variable temperature is either endothermic or exothermic, which is why this type of device is defined as a Stirling refrigeration unit rather than a Lorentz refrigeration unit, resulting in adiabatic losses from the adiabatic process in the Stirling refrigeration unit and making the Stirling refrigeration unit The performance of the refrigeration unit is degraded. Therefore, the adiabatic process in the Stirling cycle is usually considered to be a disadvantage, and in the actual Stirling unit development process, the adiabatic loss is minimized. For example, reducing the compression ratio can reduce the adiabatic loss or try to approximate isothermal process etc. Moreover, the temperature of the working fluid in the compression chamber or the expansion chamber in the Stirling device changes from time to time during the cycle (see Figure 2a) and fluctuates all the time, so that the temperature of the working fluid entering the heat exchanger is very unstable.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a regenerative device based on temperature glide absorbing or releasing heat, with a large temperature glide range and high efficiency.

The present invention further provides an operating method of the above-mentioned regenerative device.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A regenerative device, comprising a regenerative unit, the regenerative unit comprising a low-temperature cavity, a low-temperature heat exchanger, a high-temperature heat exchanger and a high-temperature cavity connected in sequence, wherein the low-temperature cavity or the high-temperature cavity is provided with a pressure a wave action device, the cold working fluid of the low temperature cavity flows out through the low temperature heat exchanger, the hot working fluid of the high temperature cavity flows out through the high temperature heat exchanger, and the regenerative unit further includes and the high temperature The parallel first working medium of the heat exchangers flows into the flow channel, and the cold working medium from the low temperature heat exchanger flows into the high temperature cavity through the first working medium flow channel;

Or, the regenerative unit further includes a second working fluid inflow channel parallel to the low temperature heat exchanger, and the hot working fluid from the high temperature heat exchanger flows into the second working fluid inflow channel through the second working fluid inflow channel. the cryogenic chamber;

Or, the regenerative unit further comprises a first working fluid inflow channel parallel to the high temperature heat exchanger, and a second working fluid inflow channel parallel to the low temperature heat exchanger, the low temperature heat exchange The cold working medium from the heat exchanger flows into the high temperature cavity through the first working medium inflow channel, and the hot working medium from the high temperature heat exchanger flows into the low temperature cavity through the second working medium inflow channel.

As a further improvement of the above technical solution:

A regenerator is arranged between the low-temperature heat exchanger and the high-temperature heat exchanger; one end of the first working fluid inflow channel is connected to one end of the regenerator, and the other end of the first working fluid inflow channel is connected to the other end of the regenerator. The high temperature cavity is connected, and/or one end of the second working medium inflow channel is connected with the other end of the regenerator, and the other end of the second working medium inflow channel is connected with the low temperature cavity.

An ejector is arranged in the low temperature chamber, the pressure wave action device includes a piston, and the maximum scavenging volume of the piston is 0.1 to 100 times the maximum scavenging volume of the ejector.

A heat transfer layer is provided on the inner surface of the high temperature chamber, the inner surface of the low temperature chamber, the surface of the piston, and/or the surface of the ejector.

There are multiple regenerative units, and the pistons of the multiple regenerative units share a crankshaft;

Or, the ejectors of a plurality of the regenerative units share a crankshaft;

Or, the pistons and the ejectors of the plurality of recuperative units share one crankshaft.

A first control valve is provided on the flow channel of the high temperature heat exchanger, and a second control valve is provided on the flow channel of the first working medium; and/or the flow channel of the low temperature heat exchanger is provided with a fourth control valve , a third control valve is arranged on the second working medium inflow channel.

The high temperature heat exchanger has a heat exchanger working fluid outflow channel, the first working fluid inflow channel is embedded between the heat exchanger working fluid outflow channels, and the first control valve and the second control valve are formed a control valve with a valve hole and a valve plate;

And/or the low-temperature heat exchanger has a heat exchanger working fluid outflow channel, the first working fluid inflow channel is embedded between the heat exchanger working fluid outflow channels, and the third control valve is connected to the fourth control valve. The control valve constitutes a control valve, and the control valve has a valve hole and a valve plate.

The heat exchanger wall of the high temperature heat exchanger has a heat transfer medium flow channel, the heat transfer medium inlet is located at one end close to the regenerator, and the heat transfer medium outlet is located at one end close to the high temperature cavity; and/or the low temperature heat exchange The heat exchanger wall of the regenerator is provided with a heat transfer medium flow channel, the heat transfer medium inlet is located at one end close to the regenerator, and the heat transfer medium outlet is located at one end close to the low temperature cavity.

The heat transfer medium flow channel is in a spiral shape.

The regenerative unit also includes a heat transfer medium mass flow adjustment device.

A first temperature equalizer is arranged between the high temperature heat exchanger and the high temperature cavity;

Or, the end of the heat exchanger wall of the high temperature heat exchanger close to the high temperature cavity is provided with an elongated section to form a first temperature equalizer;

Or, a second temperature equalizer is arranged between the low temperature heat exchanger and the low temperature cavity;

Or, the end of the heat exchanger wall of the low temperature heat exchanger close to the low temperature cavity is provided with an elongated section to form a second temperature equalizer;

Or, a first temperature equalizer is arranged between the high temperature heat exchanger and the high temperature cavity, and a second temperature equalizer is arranged between the low temperature heat exchanger and the low temperature cavity;

Or, a first temperature equalizer is arranged between the high temperature heat exchanger and the high temperature cavity, and an end of the heat exchanger wall of the low temperature heat exchanger close to the low temperature cavity is provided with an elongated section to form a second temperature equalizer;

Or, the end of the heat exchanger wall of the high temperature heat exchanger close to the high temperature cavity is provided with an elongated section to form a first temperature equalizer and a second temperature equalizer is arranged between the low temperature heat exchanger and the low temperature chamber ;

Or, the end of the heat exchanger wall of the high temperature heat exchanger close to the high temperature cavity is provided with an extended section to form the first temperature equalizer and the end of the heat exchanger wall of the low temperature heat exchanger close to the low temperature cavity is provided with an extended section to form Second thermostat.

The regenerative unit also includes a cyclic compression ratio adjustment mechanism.

One end of the regenerator close to the high temperature heat exchanger is provided with a first rectifier; and/or one end of the regenerator close to the low temperature heat exchanger is provided with a second rectifier.

The low temperature chamber or the high temperature chamber is equipped with an approximately isothermal heat exchange structure, and the approximately isothermal heat exchange structure includes a liquid separator, a liquid cooler, an adsorber, and a liquid spray component for mixing liquid and working medium , the inlet of the liquid separator is connected to the low temperature chamber or the high temperature chamber, the gas outlet of the liquid separator is connected to the inlet of the adsorber, and the liquid outlet of the liquid separator is connected to the inlet of the liquid cooler , the outlet of the liquid cooler is connected to the liquid spray component, and the outlet of the adsorber is connected to the low temperature heat exchanger or the high temperature heat exchanger;

Or, the approximately isothermal heat exchange structure includes a plurality of partitions evenly arranged along the circumferential direction of the low-temperature cavity or the high-temperature cavity, and grooves for avoiding each of the partitions. A separation cavity is formed between the adjacent separation cavities, and the adjacent separation cavities are communicated through a flow channel;

Or, the approximately isothermal heat exchange structure includes an accommodating cavity and a rotating body disposed in the accommodating cavity, and both the inlet and the outlet of the accommodating cavity are connected to the low temperature cavity or the high temperature cavity.

The high temperature heat exchanger is connected with a first heat exchange component, and a circulating heat transfer medium exists between the first heat exchange component and the high temperature heat exchanger;

Or, the low temperature heat exchanger is connected with a second heat exchange component, and there is a circulating heat transfer medium between the second heat exchange component and the low temperature heat exchanger;

Or, the high temperature heat exchanger is connected with a first heat exchange component, a circulating heat transfer medium is provided between the first heat exchange component and the high temperature heat exchanger, and the low temperature heat exchanger is connected with a second heat exchange component. A heat exchange component is provided with a circulating heat transfer medium between the second heat exchange component and the low temperature heat exchanger.

The first heat exchange component and/or the second heat exchange component are connected in series by at least 2 heat exchange units, wherein:

The inlet of the first heat exchange unit is connected to the outlet of the low temperature heat exchanger, the outlet of the first heat exchange unit is connected to the inlet of the second heat exchange unit... The outlet of the last heat exchange unit is connected to the inlet of the low temperature heat exchanger;

Or, the inlet of the first heat exchange unit is connected to the outlet of the high temperature heat exchanger, the outlet of the first heat exchange unit is connected to the inlet of the second heat exchange unit... The outlet of the last heat exchange unit is connected to the inlet of the high temperature heat exchanger.

A method of operating the above-mentioned regenerative device,

When the working fluid flows from the regenerator to the high temperature cavity, the flow channel between the high temperature heat exchanger and the high temperature cavity is closed, the first working medium flows into the flow channel, and the working medium flows through the regenerator and the first working medium in turn. Flow into the high temperature cavity; when the working medium flows from the high temperature cavity to the regenerator, the first working medium flows into the flow channel and closes, the flow channel between the high temperature cavity and the high temperature heat exchanger is opened, and the hot working medium passes through the high temperature heat exchanger and the return flow in turn. The heater flows to the low temperature chamber;

Or, when the working fluid flows from the low temperature cavity to the regenerator, the flow channel between the low temperature cavity and the low temperature heat exchanger is opened, the flow channel of the second working fluid is closed, and the working fluid flows through the low temperature heat exchanger and the regenerator in turn. High temperature cavity; when the working fluid flows from the regenerator to the low temperature cavity, the flow channel between the low temperature heat exchanger and the low temperature cavity is closed, the flow channel of the second working medium is opened, and the hot working medium passes through the regenerator and the second working medium in turn. The mass flows into the flow channel and flows into the low temperature cavity;

Or, when the working medium flows from the regenerator to the high temperature cavity, the flow channel between the high temperature heat exchanger and the high temperature cavity is closed, the first working medium flows into the flow channel, and the working medium flows through the regenerator and the first working medium in turn. The flow channel flows into the high temperature cavity; when the working medium flows from the high temperature cavity to the regenerator, the first working medium flows into the flow channel and closes, the flow channel between the high temperature cavity and the high temperature heat exchanger is opened, and the hot working medium passes through the high temperature heat exchanger in turn and the regenerator flow to the low temperature cavity; when the working fluid flows from the low temperature cavity to the regenerator, the flow channel between the low temperature cavity and the low temperature heat exchanger is opened, the flow channel of the second working medium is closed, and the working medium passes through the low temperature heat exchange in turn. The heat exchanger and the regenerator flow to the high temperature cavity; when the working fluid flows from the regenerator to the low temperature cavity, the flow channel between the low temperature heat exchanger and the low temperature cavity is closed, the flow channel of the second working medium is opened, and the hot working medium passes through the return flow in turn. The heater and the second working medium flow into the flow channel and flow into the low temperature chamber.

As a further improvement of the above technical solution:

It also includes adjusting the maximum temperature in the low temperature heat exchanger or the maximum temperature in the high temperature heat exchanger:

adjusting the inlet temperature of the heat transfer medium in the low temperature heat exchanger or the high temperature heat exchanger;

Or, adjusting the cycle compression ratio of the regenerative unit;

Or, the mass flow rate of the heat transfer medium in the low temperature heat exchanger or the high temperature heat exchanger is adjusted.

Compared with the prior art, the advantages of the present invention lie in: the regenerative device disclosed in the present invention, the regenerative unit comprises a low temperature cavity, a low temperature heat exchanger, a high temperature heat exchanger and a high temperature cavity, and the low temperature heat exchanger is connected in sequence. And/or the high temperature heat exchanger is provided with a parallel second working fluid inflow channel and/or a first working fluid inflow channel, so that the cold fluid in the low temperature cavity flows out through the low temperature heat exchanger, and the hot fluid in the high temperature cavity passes through The high temperature heat exchanger flows out, the cold working medium from the low temperature heat exchanger flows into the high temperature cavity through the first working medium flow channel, and/or the hot working medium from the high temperature heat exchanger flows into the low temperature cavity through the second working medium flow channel Therefore, by setting the first working medium into the flow channel and/or the second working medium into the flow channel, the temperature glide can absorb or release heat and have the characteristics of large temperature glide, and finally achieve high efficiency.

In the operation method of the regenerative device disclosed in the present invention, by controlling the opening and closing of each flow channel, the cold fluid in the low temperature cavity flows out through the low temperature heat exchanger, the hot fluid in the high temperature cavity flows out through the high temperature heat exchanger, and the low temperature The cold working medium from the heat exchanger flows into the high temperature cavity through the first working medium flow channel, and/or the hot working medium from the high temperature heat exchanger flows into the low temperature cavity through the second working medium flow channel, which is easy to realize and can be realized. Temperature glide is endothermic or exothermic and has large temperature glide and high efficiency.

Description of drawings

Figure 1 is a schematic diagram of the process of different kinds of cycles.

Figure 2a is a schematic diagram of the temperature change of the working medium in the Stirling cycle device.

Figure 2b is a schematic diagram of the process of the Stirling cycle.

3 is a schematic structural diagram of a regenerative unit of the regenerative device of the present invention.

FIG. 4 is a schematic structural diagram of the driving mode of the pressure wave applicator in the present invention.

FIG. 5 is a schematic diagram of the connection structure of the pressure wave applicator and the ejector in the present invention.

FIG. 6 is a schematic three-dimensional structure diagram of the heat exchanger and the temperature equalizer in the present invention.

FIG. 7 is a schematic view of the structure of the ejector in the present invention.

FIG. 8 is a schematic diagram of an approximately isothermal heat exchange structure in the present invention.

FIG. 9 is a schematic structural diagram of a multi-regeneration unit in the present invention.

10 is a schematic structural diagram of a regenerative device with heat exchange components in the present invention.

Fig. 11a is a schematic three-dimensional structure diagram of the integrated type of heat exchanger, working medium inflow channel, temperature equalizer, rectifier and control valve in the present invention.

Fig. 11b is a schematic three-dimensional structural diagram of the integrated high-temperature heat exchanger and the first working medium inflow channel in the present invention.

Fig. 11c is a schematic three-dimensional structural diagram of the integrated thermostat and rectifier in the present invention.

Fig. 11d is a schematic three-dimensional structure diagram of the control valve in the present invention.

FIG. 11e is a schematic diagram of the structure of the control valve based on the shared drive mechanism with the ejector according to the present invention.

The symbols in the figure indicate: 1, cylinder; 2, low temperature chamber; 3, low temperature heat exchanger; 4, regenerator; 5, high temperature heat exchanger; 61, the first working medium flows into the flow channel; Mass inflow channel; 7. High temperature chamber; 8. Control valve; 81, First control valve; 82, Second control valve; 83, Third control valve; 84, Fourth control valve; 91, First rectifier; 92 , second rectifier; 10, pressure wave action device; 101, piston; 102, piston connecting rod; 103, connecting rod; 104, motor; 105, engine discharger; 106, engine low temperature heat exchanger; 107, engine heat recovery 108, engine high temperature heat exchanger; 109, ejector connecting rod; 110, spring; 111, first thermostat; 112, second thermostat; 113, working medium inlet; 114, working medium outlet; 115 , heat transfer medium inlet; 116, heat transfer medium outlet; 12, discharger; 13, heat transfer layer; 14, liquid cooler; 15, liquid separator; 16, adsorber; 171, first heat exchange part; 172 , second heat exchange component; 181, first heat transfer medium mass flow adjustment device; 182, second heat transfer medium mass flow adjustment device; 191, heat exchanger and working medium inflow channel integral part; ; 201, partition plate; 202, groove; 203, accommodating cavity; 204, rotating body; 205, plane part; 206, crankshaft; 207, cross bar; 208, gear; Fan; 212, second fan; 221, first four-way valve; 222, second four-way valve; 501, heat exchanger working fluid outflow channel; 502, heat transfer medium flow channel; 503, heat exchanger wall; 801, valve hole; 802, valve plate; 803, actuator; 804, valve core.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

FIG. 3c shows an embodiment of the regenerative device of the present invention, which includes a regenerative unit. In this embodiment, there is one regenerative unit, which includes: a cylinder 1, a low-temperature chamber 2, and a low-temperature heat exchanger 3 , regenerator 4, high temperature heat exchanger 5, first working medium inflow channel 61, second working medium inflow channel 62, high temperature chamber 7, pressure wave effector 10 and ejector 12, low temperature chamber 2, high temperature chamber 7. The pressure wave applicator 10 and the ejector 12 are located in the cylinder 1 . One end of the low temperature heat exchanger 3 is connected to the low temperature chamber 2 , and the other end of the low temperature heat exchanger 3 is connected to one end of the high temperature heat exchanger 5 through the regenerator 4 . The other end of the high temperature heat exchanger 5 is connected to the high temperature chamber 7 . The ejector 12 is used to push the working medium to flow back and forth between the low temperature chamber 2 and the high temperature chamber 7, and the pressure wave applicator 10 is used to generate oscillating pressure waves. The working medium can be helium, hydrogen, nitrogen, air, etc., and the phase difference between the piston 101 and the ejector 12 is -90° to +150°. The refrigerator can be single-stage refrigeration or multi-stage refrigeration. It should be noted that the regenerator 4 can be cancelled in some special applications, such as the case where the difference between the highest temperature in the low temperature heat exchanger 3 and the lowest temperature in the high temperature heat exchanger 5 is small. If the regenerator 4 is not included in the regenerative device, one end of the low temperature heat exchanger 3 is connected to the low temperature chamber 2, the other end of the low temperature heat exchanger 3 is connected to one end of the high temperature heat exchanger 5, and the other end of the high temperature heat exchanger 5 is connected. One end is connected to the high temperature chamber 7 .

Referring to Figure 2a, in the Stirling device, the temperature of the working fluid is significantly lower than the temperature of the low-temperature heat source during the adiabatic expansion process, that is, temperature slip occurs, but the heat exchanger is basically close to the isothermal heat exchanger, and it is difficult to carry out large temperature differences. The temperature change absorbs or releases heat, resulting in adiabatic loss. The main reason is that the hot fluid from the regenerator 4 and the cold fluid from the low temperature chamber 2 alternately reciprocate in the flow channel of the low temperature heat exchanger 3. The cold fluid from the heat exchanger 4 and the hot fluid from the high temperature chamber 7 flow alternately in the flow channel of the high temperature heat exchanger 5 (see Figure 2b), and the working fluid undergoes temperature slip and flows out of the low temperature chamber 2 or the outlet of the high temperature chamber 7 At the same time, it is also the inlet of the working medium flowing into the low temperature chamber 2 or the high temperature chamber 7. Therefore, the average outlet temperature in the previous cycle is the average inlet temperature in the next cycle. The average working temperature difference of the heat exchanger increases, which reduces the efficiency. In addition, the reciprocating flow channel of the hot and cold working fluid in the heat exchanger will lead to a decrease in the amplitude of the temperature glide in the heat exchanger. Therefore, the present invention proposes that the first working medium flows into the flow channel 61 and the second working medium flows into the flow channel 62. The first working medium flows into the flow channel 61 and is provided between the regenerator 4 and the high temperature chamber 7, and the second working medium flows into the flow channel 61. The flow channel 62 is set between the regenerator 4 and the low temperature chamber 2. The first working fluid inflow channel 61 is parallel to the high temperature heat exchanger 5, and the second working fluid flow channel 62 is parallel to the low temperature heat exchanger 3. The flow resistance of the working fluid is lost, the low temperature heat exchanger 3 and the second working fluid inflow channel 62 have the same pressure, and the high temperature heat exchanger 5 and the first working fluid inflow channel 61 have the same pressure. Ideally: all the hot fluid from the regenerator 4 flows into the low temperature chamber 2 through the second working fluid inflow channel 62, and all the cold fluid from the low temperature chamber 2 flows to the regenerator 4 through the low temperature heat exchanger 3 ; The cold fluid from the direction of the regenerator 4 all flows into the high temperature chamber 7 through the first working fluid inflow channel 61, and the hot fluid from the high temperature chamber 7 all flows to the regenerator 4 through the high temperature heat exchanger 5. Therefore, Through the first working medium flowing into the flow channel 61 and the second working medium flowing into the flow channel 62, the temperature of the working medium flowing from the regenerator 4 into the low temperature chamber 2 or the high temperature chamber 7 is close to the outlet temperature of the regenerator, rather than the low temperature heat exchange The temperature at the end of the low temperature chamber of the heat exchanger 3 or the temperature at the end of the high temperature chamber of the high temperature heat exchanger 5, so as to achieve a wide range of temperature glide and high efficiency. In addition, the first working medium flowing into the flow channel 61 and the second working medium flowing into the flow channel 62 can also potentially reduce the flow resistance in the process of the working medium flowing into the low temperature chamber 2 and the high temperature chamber 7, and further improve the efficiency.

The above-mentioned regenerative device may be arranged at the low temperature end or the high temperature end according to the application requirements of temperature glide. As shown in the first embodiment, it is arranged at the low temperature end and the high temperature end at the same time.

In addition, the above-mentioned regenerative device may also include sensors for detecting relative signals such as displacement, speed, rotational speed, pressure, temperature, and the phase between the piston 101 and the ejector 12 .

Embodiment 2

Taking Fig. 3c as an example, the specific flow process of the working fluid in the present invention is described: when the working fluid flows from the low temperature chamber 2 to the high temperature chamber 7 under the action of the ejector 12, ideally, all the working fluids are controlled to pass through the low temperature heat exchanger 3. After the outflow and the working fluid flow out from the low temperature chamber 2, all the working fluid flows into the high temperature chamber through the first working fluid flow channel 61; when the working fluid flows from the high temperature chamber 7 to the low temperature chamber 2 under the action of the ejector 12, ideally, the working fluid is controlled All flow out through the high temperature heat exchanger 5 , and after the working medium flows out from the high temperature chamber 7 , all flow into the low temperature chamber 2 through the second working medium inflow channel 62 . In practice, it is difficult to fully realize the above ideal situation because the control process requires reaction time, or in order to reduce the oscillation generated by opening or closing. No less than 50% of the total working fluid of 1 , and the remaining part flows out through the second working fluid inflow channel 62. The working fluid flows out from the low temperature chamber 2 and flows to the high temperature chamber 7 through the regenerator 4, and the control working fluid passes through the high temperature heat exchanger. 5 The inflowing working medium is not more than 50% of the total working medium flowing into the high temperature chamber 7, and the rest flows through the first working medium inflow channel 61; when the working medium flows from the high temperature chamber 7 to the low temperature chamber under the action of the ejector 12 At 2:00, no less than 50% of the total working fluid flowing out of the high temperature chamber 7 is controlled by the working fluid flowing out of the high temperature heat exchanger 5, and the rest of the working fluid flows out through the first working fluid into the flow channel 61, and the working fluid flows out of the high temperature chamber 7 After flowing out, it flows to the low temperature chamber 2 through the regenerator 4, and the working medium flowing into the low temperature heat exchanger 3 is controlled to be no more than 50% of the total working medium flowing into the low temperature chamber 2, and the rest flows into the flow channel through the first working medium. 61 inflow. Preferably, the ratio of the first working medium flowing into the flow channel 61 and the second working medium flowing into the flow channel 62 into the low temperature cavity 2 and the high temperature cavity 7 is between 0.8 and 1. The first working medium flows into the flow channel 61 and the second working medium flows into the flow channel 61. The ratio of the mass flow channel 62 flowing out of the low temperature chamber 2 and the high temperature chamber 7 is between 0 and 0.2, which is as close to the ideal situation as possible.

As shown in FIG. 4, the pressure wave applicator 10 can be thermally driven or electrically driven. When the pressure wave applicator 10 is electrically driven, it also includes a motor 104 and a piston 101. FIG. 4a shows a crank-connecting rod-based In the electric drive mode of the mechanism, the rotary motor piston 101 is connected to the motor 104 through the piston connecting rod 102 and the connecting rod 103 in turn. When the pressure wave applicator 10 is driven by heat, it also includes a Stirling-type engine. Figures 4b and 4c show a Stirling-type engine-based structure, respectively. The Stirling-type engine in Figure 4b includes the engine room temperature The heat exchanger 106, the engine regenerator 107, the engine high temperature heat exchanger 108 and the engine exhauster 105, the Stirling engine in Fig. 4c includes the engine room temperature heat exchanger 106, the engine regenerator 107, the engine high temperature heat exchanger 108. Engine ejector 105 and piston 101. In addition, the Stirling-type engine may also be a thermoacoustic engine. Further, it also includes auxiliary equipment such as burners, flue gas and air heat exchangers based on fuel as a heat source, or auxiliary equipment such as solar collectors and heat storage devices based on solar energy as a heat source.

As shown in FIG. 5 , the connection between the piston 101 in the pressure wave applicator 10 and the ejector 12 can be a free piston, a crank connecting rod, a diamond mechanism, etc. The ejector 12 is provided with an ejector connecting rod 109, as shown in FIG. 5a The free-piston type, which includes the ejector 12, the ejector connecting rod 109, the linear motor 104, the piston 101, the piston connecting rod 102 and the spring 110; FIG. 5b shows the crank connecting rod type, which includes the rotary motor 104, the piston 101 , piston connecting rod 102, ejector 12, ejector connecting rod 109, connecting rod 103 and crankshaft 206; FIG. 5c shows a diamond-shaped mechanism, which includes a rotating motor 104, piston 101, piston connecting rod 102, ejector 12, ejector The connecting rod 109, the gear 208, the cross bar 207, the connecting rod 103 and the flywheel (not shown in the figure). In addition, the connection between the piston 101 and the ejector 12 may also be a Scotch yoke, a swash plate, etc., which will not be described again. The pressure wave applicator 10 can be arranged in the low temperature chamber 2 or the high temperature chamber 7. Fig. 5a and Fig. 5b show two schemes in which the pressure wave applicator 10 is arranged in the high temperature chamber 7. In Fig. 5b, the piston 101 and the ejector 12 are shared. Cylinder 1, in Figure 5a, the piston 101 and the ejector 12 do not share the same cylinder 1. The high temperature end of the cylinder 1 where the piston 101 is located and the cylinder 1 where the ejector 12 is located are connected by a connecting pipe. In this scheme, the high temperature chamber 7 is divided into two parts: one part is located in The piston 101 is located in the cylinder 1, and a part is located in the cylinder 1 where the ejector 12 is located. Similarly, when the pressure wave applicator 10 is located in the low temperature chamber 2, the cylinder 1 where the pressure wave applicator 10 is located and the cylinder 1 where the ejector 12 is located can be. The cylinder 1 is shared or the cylinder 1 is not shared. When the cylinder 1 is not shared, the two cylinders 1 are connected through a connecting pipe. Preferably, the pressure wave applicator 10 is arranged in the high temperature chamber 7 .

Further, a first control valve 81 is arranged on the flow channel of the high temperature heat exchanger 5 , a second control valve 82 is arranged on the first working medium inflow channel 61 , and a third control valve 82 is arranged on the second working medium inflow channel 62 . Valve 83, a fourth control valve 84 is arranged on the flow channel of the low temperature heat exchanger 3, preferably, the first control valve 81 is arranged on the flow channel between the high temperature heat exchanger 5 and the high temperature chamber 7, and the fourth control valve 84 is arranged. On the flow channel between the low temperature chamber 2 and the low temperature heat exchanger 3 . Specifically, during the flow of the working fluid into the low temperature chamber 2, the third control valve 83 remains open and the fourth control valve 84 remains closed; during the working fluid flows into the high temperature chamber 7, the first control valve 81 remains closed, the second The control valve 82 remains open; when the flow of the working medium into the low temperature chamber 2 is about to end or the flow of the working medium from the low temperature chamber 2 begins, the fourth control valve 84 begins to open, and the third control valve 83 begins to close, and when the working medium flows into the high temperature chamber 7 When the process is about to end or the working fluid flows out of the high temperature chamber 7, the second control valve 82 starts to close and the first control valve 81 starts to open; The third control valve 83 starts to open, and the fourth control valve 84 starts to close. When the working fluid flows out of the high temperature chamber 7 or just begins the process of the working fluid flowing into the high temperature chamber 7, the first control valve 81 starts to close, and the second control valve 82 starts to open. . It should be pointed out that during the closing and opening process of the first control valve 81, the second control valve 82, the third control valve 83, and the fourth control valve 84, due to the fact that the closing and opening of the first control valve 81, the second control valve 82, the third control valve 83, and the fourth control valve 84 take a period of time or reduce the opening or closing Oscillation, therefore, will exist for a short period of time while being on at the same time. The first control valve 81 , the second control valve 82 , the third control valve 83 and the fourth control valve 84 may be, for example, a one-way valve, a solenoid valve, a three-way valve, or the like. When a one-way valve is used, the one-way valve on the flow channel of the working fluid is opened from the regenerator 4 to the low temperature chamber 2 or the high temperature chamber 7, and closed in the opposite direction; The cavity 2 and the high temperature cavity 7 are opened in the direction of the low temperature heat exchanger 3 and the high temperature heat exchanger 5, and closed in the opposite direction. When a three-way valve is used, the first control valve 81 and the second control valve 82 share the actuator; the third control valve 83 and the fourth control valve 84 share the actuator, therefore, based on the three-way valve, if the first control valve is controlled When the valve 81 is opened, the second control valve 82 is closed at the same time, and vice versa. Preferably, the time required for each control valve to go from being completely closed to being completely opened is 0.01-1 times t _cycle , and t _cycle is the running time of the next cycle at the rated frequency of the regenerative device. Further, control valves can be arranged at both ends of the low-temperature heat exchanger 3 and the high-temperature heat exchanger 5 at the same time, so that the working medium can flow according to the set path as much as possible.

Further, the high temperature heat exchanger 5 and the low temperature heat exchanger 3 have a heat transfer medium flow channel 502, wherein the heat transfer medium can be an aqueous solution, air or a gas to be liquefied such as CO ₂ , natural gas, hydrogen, etc., the high temperature heat exchanger 5. The heat transfer medium inlet 115 of the heat transfer medium channel 502 in the low temperature heat exchanger 3 is at the end of the regenerator 4, the heat transfer medium outlet 116 is at the end of the low temperature chamber 2 or the high temperature chamber 7, and the high temperature heat exchanger 5, the low temperature The heat transfer medium in the heat exchanger 3 exchanges heat with the working medium, and flows out from the heat transfer medium outlet 116 at the end of the low temperature chamber 2 or the high temperature chamber 7 . The heat transfer medium flow channel 502 can be a straight pipe flow channel or a spiral flow channel. Preferably, the heat transfer medium flow channel 502 is in a spiral shape (as shown in FIG. 6 ), which is beneficial to improve the relationship between the heat transfer medium and the working medium. heat exchange. It should be pointed out that the spiral flow channel is relative to the straight tube flow channel, that is, the flow direction of the heat transfer medium has a relatively obvious bend in the flow process, which is a spiral channel. If the flow is "zigzag" or serpentine, it is also a spiral The shape of the flow channel, or the flow path length ≥ 110% of the shortest straight length between the outlet and the inlet during the flow of the heat transfer medium is a spiral. For example, the flow path is 11cm, and the shortest straight length between the outlet and the inlet is 9.5cm, and since the flow path is greater than 110% of 9.5cm, it is a spiral flow channel. Further, the heat transfer medium flow channel can be arranged outside the cylinder wall (as shown in Figure 6) or between the cylinder walls. heat exchange.

Further, the regenerative unit is also provided with a heat transfer medium mass flow adjustment device. The heat transfer medium mass flow adjustment device can be a variable frequency fluid machine or a valve with adjustable opening, and the variable frequency fluid machine can be a variable frequency pump or a variable frequency fan. Specifically, by controlling the rotational speed of the variable frequency fluid machine and the opening of the valve, the mass flow of the heat transfer medium in the heat exchanger can be adjusted. Heat transfer medium mass flow:

Further, the mass flow rate of the heat transfer medium in the heat exchanger with parallel working medium inflow channels:

为传热媒介质量流量、

为工质放热量或吸热量。where T is the temperature, Cp is the specific heat,

is the mass flow rate of the heat transfer medium,

It releases or absorbs heat for the working medium.

Embodiment 3

Referring to FIG. 3 a , if the high temperature end needs to absorb or release heat due to temperature glide, the above-mentioned first working medium is arranged to flow into the flow channel 61 at the high temperature end. Correspondingly, a first control valve 81 is provided on the flow channel of the high temperature heat exchanger 5, and a second control valve 82 is provided on the first working medium inflow channel 61. FIG. 3a shows that the first control valve 81 is set in the high temperature heat exchange Between the heat exchanger 5 and the regenerator 4 , preferably, the first control valve 81 is arranged between the high temperature heat exchanger 5 and the high temperature chamber 7 . The fourth control valve 84 may not be provided on the flow channel between the low temperature chamber 2 and the low temperature heat exchanger 3 . Correspondingly, the first temperature equalizer 111 is provided between the high temperature heat exchanger 5 and the high temperature chamber 7, and the second temperature equalizer 112 may not be provided between the warm heat exchanger 3 and the low temperature chamber 2.

Referring to FIG. 3b , if the low temperature end needs to absorb or release heat due to temperature glide, the above-mentioned second working medium is arranged to flow into the flow channel 62 at the low temperature end. Correspondingly, a third control valve 83 is provided on the second working fluid inflow channel 62 , a fourth control valve 84 is provided on the channel between the low temperature chamber 2 and the low temperature heat exchanger 3 , and the high temperature heat exchanger 5 is connected to the regenerative heat exchanger 3 . The first control valve 81 may not be provided on the flow channel between the devices 4 . Correspondingly, the second temperature equalizer 112 is provided between the low temperature heat exchanger 3 and the low temperature chamber 2, and the first temperature equalizer 111 may not be provided between the high temperature heat exchanger 5 and the high temperature chamber 7, that is, for no parallel work The heat exchanger where the mass flows into the flow channel may not be provided with a temperature equalizer.

Embodiment 4

Further, the regenerative unit further includes a first temperature equalizer 111 and a second temperature equalizer 112 . The first temperature equalizer 111 is located between the high temperature chamber 7 and the high temperature heat exchanger 5, specifically between the first control valve 81 and the high temperature heat exchanger 5, and the second temperature equalizer 112 is located between the low temperature chamber 2 and the low temperature heat exchanger 5 3, specifically, between the fourth control valve 84 and the low-temperature heat exchanger 3. The first temperature equalizer 111 and the second temperature equalizer 112 are set to control the temperature fluctuation when the working medium flows into the high temperature heat exchanger 5 and the low temperature heat exchanger 3. The shape can be foam metal or wire mesh filling type, or can be It is a tube type or a tube-fin type. Since the temperature of the working fluid entering the heat exchanger keeps changing, the working fluid will exchange heat with foam metal, wire mesh, tube wall or tube-fin during the process of flowing through the thermostat. After the thermostat, the outflow temperature of the working medium is lowered. When the lower temperature of the incoming working medium flows through the thermostat, the outflow temperature of the working medium is increased, which stabilizes the inlet temperature of the working medium of the high temperature heat exchanger 5 and the low temperature heat exchanger 3. , to realize the low temperature heat exchanger 3 or high temperature heat exchanger 5 working fluid inlet temperature during the process of the working fluid flowing from the low temperature chamber 2 through the low temperature heat exchanger 3 to the high temperature chamber 7 or from the high temperature chamber 7 through the high temperature heat exchanger 5 to the low temperature chamber 2 Fluctuation ≤ The temperature in the low temperature chamber or the high temperature chamber fluctuates more than 3°C during the process (Note: This process means that the working fluid flows from the low temperature chamber 2 through the low temperature heat exchanger 3 to the high temperature chamber 7 or from the high temperature chamber 7 through the high temperature heat exchanger 5 The process of flowing to the low temperature chamber 2), that is, if the difference between the maximum temperature and the minimum temperature of the working medium in the low temperature chamber 2 is 10 °C during the outflow of the working medium, then the difference between the maximum temperature and the minimum temperature of the working medium at the inlet of the low temperature heat exchanger 3 in this process is ≤7 °C. Further, the temperature fluctuation of the outlet of the heat transfer medium in the low temperature heat exchanger 3 or the high temperature heat exchanger 5 is ≤±2°C. Preferably, the first thermostat 111 and the second thermostat 112 are made of high thermal conductivity materials such as copper or aluminum.

It should be pointed out that the heat exchanger and the corresponding temperature equalizer can be of a split structure or an integrated one-piece structure, as shown in Figure 6. In this case, the heat exchanger and the corresponding temperature equalizer are integrated One end of the heat exchanger wall 503 close to the low temperature chamber 2 or the high temperature chamber 7 is provided with an elongated section to form a temperature equalizer. Therefore, the thermostat section and the working medium inlet 113 are located at one end of the integrated structure close to the low temperature cavity 2 and the high temperature cavity 7, and the heat exchanger section and the working medium outlet 114 are located at the end close to the regenerator 4, and the heat transfer medium The flow channel is a spiral structure, the heat transfer medium inlet 115 is located at one end close to the regenerator 4, and the heat transfer medium outlet 116 is located at one end close to the low temperature chamber 2 and the high temperature chamber 7. When the working fluid passes from the low temperature chamber 2 to the low temperature heat exchanger 3 During the process of flowing into the high temperature chamber 7 or from the high temperature chamber 7 into the low temperature chamber 2 through the high temperature heat exchanger 5, the temperature fluctuation of the working medium at the position of the working medium flow channel corresponding to the position of the heat transfer medium outlet in the heat exchanger is ≤ during the process. 2 or the temperature in the high temperature chamber 7 fluctuates more than 3°C. In addition, the temperature equalizer can also be used as the connecting pipe from the low temperature chamber 2 to the low temperature heat exchanger 3 and/or the connecting pipe from the high temperature chamber 7 to the high temperature heat exchanger 5, so as to finally realize the corresponding position of the heat transfer medium outlet in the heat exchanger. The temperature fluctuation of the working medium at the position of the working medium flow channel is less than or equal to 3°C or more in the low temperature chamber 2 or the high temperature chamber 7 during this process.

After the heat transfer medium enters the heat exchanger from the end of the regenerator, the heat transfer medium releases or absorbs heat due to the temperature glide in the heat exchanger. Preferably, the temperature difference between the inlet and outlet of the heat transfer medium in the heat exchanger is ≥7°C.

As shown in FIG. 7 , the inner surface of the low temperature chamber 2 or the high temperature chamber 7 has a heat transfer layer 13 , and/or the surface of the piston 101 or the ejector 12 has a heat transfer layer 13 , wherein the heat transfer layer 13 can be, for example, a coating or different from For the material layer of the cylinder or piston, the thermal conductivity of the heat transfer layer material needs to be different from that of the cylinder 1 material.

As described above, during the switching process of the first control valve 81 , the second control valve 82 , the third control valve 83 and the fourth control valve 84 , some low-temperature fluid or high-temperature fluid may flow through the first working fluid inflow flow Channel 61 and the second working medium flow into the flow channel 62. For example, if the working medium flows from the second working medium into the flow channel 62 and flows into the low temperature chamber 2, at this time, the third control valve 83 on the second working medium flow into the flow channel 62 is opened and the fourth control valve 83 is opened. The valve 84 is closed. When the working fluid flows into the low temperature chamber 2, the third control valve 83 starts to close and the fourth control valve 84 starts to open. Since the opening or closing of the control valve takes a period of time, in order to avoid heat loss, the third control valve is closed. The outer walls of the first working medium inflow channel 61 and the second working medium inflow channel 62 may also have a heat transfer medium. Further, when the outer walls of the first working medium inflow channel 61 and the second working medium inflow channel 62 have a heat transfer medium, the amount of heat released through the first working medium inflow channel 61 ≤ the amount of heat released by the high temperature heat exchanger 5 50%, the heat absorption of the second working medium flowing into the flow channel 62≤50% of the heat absorption of the low temperature heat exchanger 3 .

Preferably, the maximum scavenging volume of the piston 101 is 0.1 to 100 times the maximum scavenging volume of the ejector 12 . Further preferably, in order to achieve a wide range of temperature glide, the maximum scavenging volume of the piston 101 is 0.5 to 30 times the maximum scavenging volume of the ejector 12 .

The maximum slip temperature range in the heat exchanger of the regenerative device is determined by the cyclic compression ratio. Therefore, preferably, the regenerative device further includes a cyclic compression ratio adjustment mechanism (not shown in the figure), and the cyclic compression ratio adjustment mechanism can be adjusted. The ratio of the maximum pressure to the minimum pressure during the cycle of a regenerative unit. The cyclic compression ratio adjustment mechanism may be, for example, a dead volume adjustment mechanism, a stroke adjustment mechanism of the piston 101, a phase difference adjustment mechanism between the piston 101 and the ejector 12, or a pressure wave action device 10, etc. The mechanism of the dead volume of the thermal device, for example, is composed of multiple sets of dead volume cavities and valves, the dead volume cavity is communicated with the regenerative device, and there is a valve on the communication pipeline between the dead volume cavity and the regenerative device. Closing the valve can control the connection and disconnection of a certain group of dead volume cavities and the regenerative unit, thereby adjusting the dead volume of the regenerative device; the phase difference adjustment mechanism between the piston 101 and the ejector 12, such as the piston 101 and the exhaust The actuators 12 are driven by different crankshafts respectively, and the phase between the crankshafts can be adjusted, and the phase difference between the piston 101 and the ejector 12 can be adjusted. For example, the piston 101 and the ejector 12 are free piston type, and the stroke of the piston 101 can be adjusted to change the heat recovery. The pressure of the type device is adjusted to adjust the phase difference between the piston 101 and the ejector 12 .

Embodiment 5

Further, either end of the regenerator 4 is provided with a rectifier, or both ends are respectively provided with a first rectifier 91 and a second rectifier 92, one end of the first rectifier 91 is connected to the regenerator 4, and the other end of the first rectifier 91 is connected to the high temperature exchanger. The heat exchanger 5 and/or the first working medium flows into the flow channel 61, one end of the second rectifier 92 is connected to the regenerator 4, and the other end of the second rectifier 92 is connected to the low temperature heat exchanger 3 and/or the second working medium flows into the flow channel 62, It is used for evenly distributing the working medium into the regenerator 4 , or evenly flowing the working medium from the regenerator 4 into the first working medium into the flow channel 61 and the second working medium into the flow channel 62 . Further, a rectifier may also be provided between the low temperature chamber 2 and the low temperature heat exchanger 3 and the second working medium inflow channel 62, and between the high temperature chamber 7 and the high temperature heat exchanger 5 and the first working medium inflow channel 61. Set up the rectifier. In addition, the rectifier can be integrated with the heat exchanger or the heat spreader, for example, the rectifier between the regenerator and the heat exchanger can be integrated with the heat exchanger, and the rectifier between the heat spreader and the heat exchanger can be integrated with the heat exchanger. The thermostat is integrated.

Embodiment 6

In many cases, one heat source temperature is approximately constant between the two heat source temperatures, for example, the temperature of the heat dissipation heat source is constant during cooling. For this heat source with an approximately constant temperature, the use of temperature glide to absorb or release heat will result in irreversible losses. In addition, at a larger cyclic compression ratio, although the adiabatic loss is reduced by heat absorption or heat release through temperature glide, the adiabatic loss may still be larger. Therefore, the regenerative device of the present invention also includes a near-isothermal heat exchange Structure: As shown in Figure 8a, it is an approximate isothermal heat exchange structure based on liquid heat absorption, including a liquid separator 15, an adsorber 16, a liquid cooler 14 and a liquid spray component (not shown in the figure, such as installing a spray head Or directly open a liquid spray port to achieve liquid spray), before the working medium flows into the high temperature chamber 7, the liquid is sprayed through the liquid spray port, the working medium is mixed with the liquid, and then flows into the high temperature chamber 7, in the high temperature chamber 7 The working medium exchanges heat with the liquid, Due to the high density of the liquid, an approximately isothermal process can be maintained. When the working fluid flows out of the high-temperature chamber 7, it first enters the liquid separator 15 to separate the liquid from the liquid-working fluid mixture. The separated working fluid is further purified by the adsorber 16, and then exchanges heat with a heat source whose temperature is approximately constant. The liquid is cooled by the liquid cooler 14 and used for the next spraying. This example is for illustration only, and the approximately isothermal heat exchange structure can be arranged only at the low temperature end or the high temperature end according to the needs, or a pseudo isothermal heat exchange structure can be provided at the low temperature end and the high temperature end at the same time, and the pseudo isothermal heat exchange structure can be operated or stopped as required. function of thermal structure.

Embodiment 7

As shown in Figures 8b to 8d, it is an approximate isothermal heat exchange structure based on multiple cavities, including multiple partitions 201, and the multiple partitions 201 evenly divide the inner cavity of the cylinder 1 into multiple partitioned cavities in the circumferential direction , the adjacent partition cavities can be communicated through the cavity connecting pipe 209, or the partition plate 201 can be opened to realize the communication between the adjacent partition cavities. Preferably, the baffles 201 are arranged in a cross shape. When the ejector 12 or the piston 101 moves, the working fluid in one of the partitioned chambers flows into the other partitioned chamber through the chamber connecting pipe 209 . The end of the cylinder 1 or the ejector 12 or the piston 101 has a groove 202 with the partition plate 201 , and the width of the groove 202 is 50 μm˜5 mm larger than the width of the partition plate 201 . Preferably, a groove 202 is formed on the piston 101 . Further, the cavity connecting pipe 209 is filled with ribs or foamed metal or wire mesh. Furthermore, the cavity connecting pipe 209 has a heat transfer medium outside the cavity connecting pipe 209 to exchange heat with the cavity connecting pipe 209 . Further, the heat exchanger is integrated on the cylinder head of the cylinder 1, and each cavity connecting pipe 209 is integrated with the cylinder head. This example is for illustration only, and the approximately isothermal heat exchange structure can be arranged only at the low temperature end or the high temperature end according to the needs, or a pseudo isothermal heat exchange structure can be provided at the low temperature end and the high temperature end at the same time, and the pseudo isothermal heat exchange structure can be operated or stopped as required. function of the thermal structure.

Embodiment 8

As shown in FIG. 8e, it is an approximate isothermal heat exchange structure based on a motor, including a rotating body 204 and a motor 104 for driving the rotating body 204 to rotate. The motor 104 is connected to the rotating body 204, and the rotating body 204 is located in the accommodating cavity 203. Connected with the high temperature chamber 7 , under the action of the motor 104 , the rotating body 204 rotates, and the working fluid sucked through the inlet exchanges heat with the surface of the rotating body 204 . Further, in order to increase the heat exchange effect, fins or flat portions 205 may be provided on the surface of the rotating body 204 . Furthermore, the outer surface of the accommodating cavity 203 where the rotating body 204 is located has a heat transfer medium. This example is for illustration only, and the approximately isothermal heat exchange structure can be arranged only at the low temperature end or the high temperature end according to the needs, or a pseudo isothermal heat exchange structure can be provided at the low temperature end and the high temperature end at the same time, and the pseudo isothermal heat exchange structure can be operated or stopped as required. function of the thermal structure.

Embodiment 9

The regenerative device of this embodiment includes a plurality of the above-mentioned regenerative units. As shown in FIG. 9a, a plurality of pistons 101 and an ejector 12 share the same crankshaft 206, or a plurality of pistons 101 share a same crankshaft 206 , the plurality of ejectors 12 share another crankshaft 206 . Preferably, there is a certain phase difference between the pistons 101 and a certain phase difference between the ejectors 12 . The temperature in each low temperature heat exchanger 3 or high temperature heat exchanger 5 may be the same or different. The heat transfer medium can be connected in series or in parallel in multiple low temperature heat exchangers 3 or high temperature heat exchangers 5. For example, when connecting in series, the heat transfer medium can first flow in from the first low temperature heat exchanger 3, and then flow in from the second low temperature heat exchanger 3. One low-temperature heat exchanger 3 flows out, then enters the second low-temperature heat exchanger 3, and finally flows out from the second low-temperature heat exchanger 3, forming the first low-temperature heat exchanger 3 flowing in and out-the second low-temperature heat exchanger The heat exchanger 3 flows into and out of the heat source. As shown in Figure 9b, it is also possible that the heat transfer medium first flows in from the first low temperature heat exchanger 3, then flows out from the first low temperature heat exchanger 3, then enters the second low temperature heat exchanger 3, and then flows from the first low temperature heat exchanger 3. The second low temperature heat exchanger 3 flows out, and then enters the first low temperature heat exchanger 3 and flows in, forming the first low temperature heat exchanger 3 flows in and out - the second low temperature heat exchanger 3 flows in and out - the first low temperature heat exchanger 3 flows in, out - the second low temperature heat exchanger 3 flows in and out - ... - heat source.

Embodiment ten

As shown in FIG. 10 , the regenerative device includes heat exchange components. The heat exchange components can be used only at the low temperature end or the high temperature end, or can be used at both the low temperature end and the high temperature end. The first heat exchange component 171 and the second heat exchange component The components 172 are respectively connected to the high temperature heat exchanger 5 and the low temperature heat exchanger 3 through a heat transfer medium to exchange heat. Further, the first heat exchange part 171 and/or the second heat exchange part 172 are connected in series by ≥N (where N is an integer of ≥2) heat exchange units, wherein: the inlet of the first heat exchange unit exchanges with the low temperature The outlet of the heat exchanger 3 and/or the high temperature heat exchanger 5 is connected to the outlet, the outlet of the first heat exchange unit is connected to the inlet of the second heat exchange unit, the outlet of the second heat exchange unit is connected to the inlet of the next heat exchange unit, and finally the Nth The outlet of the heat exchange unit is connected to the inlet of the low temperature heat exchanger 3 and/or the high temperature heat exchanger 5 . The inlet of the low temperature heat exchanger 3 is the heat transfer medium inlet 115, the outlet of the low temperature heat exchanger 3 is the heat transfer medium outlet 116; the inlet of the high temperature heat exchanger 5 is the heat transfer medium inlet 115, the The outlet of the high temperature heat exchanger 5 is the heat transfer medium outlet 116 . The N heat exchange units can be independent or integral. The independent type means that multiple external fluids exchange heat with the N heat exchange units respectively. When the integral N heat exchange units exchange heat with the external fluid, the external fluid passes through the first N heat exchange unit, N-1th heat exchange unit... The first heat exchange unit and heat exchange with the heat transfer medium inside the unit, that is, the entrance of the last heat exchange unit through which the external fluid flows out of the integral heat exchange component It is connected to the outlet of the low temperature heat exchanger 3 or the high temperature heat exchanger 5. Further, the first heat exchange part 171 has a first fan 211 , and the second heat exchange part 172 has a second fan 212 . Fig. 10 shows a regenerative device with a first heat exchange part 171 and a second heat exchange part 172, wherein the second heat exchange part 172 is composed of a plurality of heat exchange units, the second heat exchange part in Fig. 10a The heat exchange units in 172 are independent, each heat exchange unit has an independent fan, and multiple fluids exchange heat with each heat exchange unit respectively. In Fig. 10b, the heat exchange unit in the second heat exchange component 172 is an integral type, and the three heat exchange units share one fan, and the external fluid flows out through the third heat exchange unit, the second heat exchange unit and the first heat exchange unit in sequence, wherein The inlet of the first heat exchange unit is connected to the heat transfer medium outlet 116 of the low temperature heat exchanger 3 , and the outlet of the third heat exchange unit is the heat transfer medium inlet 115 of the low temperature heat exchanger 3 . Further, there is a first heat transfer medium mass flow adjusting device 181 between the first heat exchange component 171 and the high temperature heat exchanger 5 , and a second heat transfer medium mass between the second heat exchange component 172 and the low temperature heat exchanger 3 The flow adjustment device 182 can adjust the mass flow of the heat transfer medium based on the first heat transfer medium mass flow adjustment device 181 and the first heat transfer medium mass flow adjustment device 182 . In addition, the first heat exchange part 171 and the second heat exchange part 172 can also be used as energy storage parts and store heat based on sensible heat or latent heat, preferably sensible heat heat storage, and the heat transfer medium used can be water, water and ethylene glycol For example, a solution, brine or oil, etc., can be exchanged with the low-temperature heat exchanger 3 to obtain low-temperature water, and then the low-temperature chilled water can be stored in the second heat exchange component 172 .

Further, the regenerative device includes a first four-way valve 221 and a second four-way valve 222. As shown in FIG. 10c, the first four-way valve 221 and the second four-way valve 222 each have a, b, c, d Four ports. The a port of the first four-way valve 221 is connected to one end of the high temperature heat exchanger 5, the b port is connected to one end of the first heat exchange component 171, the c port is connected to one end of the low temperature heat exchanger 3, and the d port is connected to the second heat exchanger. One end of the heat part 172 is connected; the a port of the second four-way valve 222 is connected to the other end of the high temperature heat exchanger 5 , the b port is connected to the other end of the first heat exchange part 171 , and the c port is connected to the low temperature heat exchanger 3 . The other end is connected, and the d port is connected to the other end of the second heat exchange component 172 . During cooling: the a port of the first four-way valve 221 communicates with the b port, the c port communicates with the d port, the a port of the second four-way valve 222 communicates with the b port, and the c port communicates with the d port. During heating: the a port of the first four-way valve 221 is communicated with the d port, the b port is communicated with the c port, the a port of the second four-way valve 222 is communicated with the d port, and the b port is communicated with the c port.

Embodiment 11

Figure 11a shows a schematic diagram of the structure of a heat exchanger, a working medium inflow channel, a temperature equalizer and a control valve. A temperature equalizer is provided between the control valve and the heat exchanger, wherein 191 is the heat exchanger and the working fluid. The mass flow channel is an integral piece, 192 is a thermostat, and 8 is a control valve. Taking the high temperature heat exchanger 5 and the first working fluid inflow channel 61 as an example, as shown in FIG. 11b, the high temperature heat exchanger 5 has the heat exchanger working fluid outflow channel 501, the heat transfer medium flow channel 502 and the heat exchanger The wall 503, the high temperature heat exchanger 5 and the first working medium inflow channel 61 are integrated into one piece, and N channels are arranged between the two annular cylinder walls of the integrated piece, wherein x channels are used for the working medium to flow into the flow channel 61 , the y channels are used for the heat exchanger working fluid to flow out of the flow channel 501. In order to reduce the heat exchange between the working medium and the external medium through the x working medium into the flow channel 61, the design is related to reduce the working medium flowing into the flow channel 61 and the external medium. Heat exchange scheme, for example: the number of working fluid flowing into the flow channel 61 is less than the number of working fluid flowing out of the heat exchanger 501; or the hydraulic diameter of the working fluid flowing into the channel 61 ≥ the hydraulic diameter of the working fluid flowing out of the heat exchanger 501; or The surface of the mass inflow channel 61 has a low thermal conductivity material. In addition, there are other solutions for reducing the heat exchange between the working medium flowing into the flow channel 61 and the external medium, which will not be repeated here.

As shown in FIG. 11 c , the temperature equalizer 192 has a first channel that communicates with the working fluid outflow channel 501 of the heat exchanger, and a second channel that communicates with the working fluid inflow channel 61 . The size of the holes at both ends of the first channel or the second channel of the temperature equalizer 192 may be different. Further, the temperature equalizer 192 also has the rectification function of evenly distributing the fluid, and the temperature equalizer 192 acts as a rectifier. Further, an independent rectifier can also be inserted between the temperature equalizer 192 and the working fluid flow channel integrated piece 191 . As shown in FIG. 11d, the control valve 8 has a valve hole 801, a valve plate 802 and an actuator 803, and the valve hole 801 communicates with the high temperature chamber 7. Preferably, the control valve 8 has ≥1 valve hole 801 and ≥1 valve board 802. By controlling the actuator 803 to rotate the control valve, the valve hole 801 communicates with the first passage of the thermostat 192, and the valve plate 802 closes the second passage of the thermostat 192. Since the first passage of the thermostat 192 and the working fluid of the heat exchanger flow out of the flow passage 501 is connected, therefore, the valve hole 801 is also communicated with the heat exchanger working fluid outflow channel 501; the control actuator 803, the rotary control valve, the valve hole 801 is connected to the second channel of the thermostat 192, and the valve plate 802 closes the thermostat 192 For the first channel, since the second channel of the temperature equalizer 192 communicates with the working fluid inflow channel 61 , the valve hole 801 is also communicated with the working fluid inflow channel 61 . Further, the actuator 803 can be electrically driven or mechanically driven to realize the rotation of the control valve.

Figure 11e shows a schematic structural diagram of a three-way control valve. The control valve 8 includes a valve core 804. The working fluid inflow channel and the heat exchanger share the same valve core 804. The valve core 804 can be driven mechanically or electromagnetically. Figure 11e A schematic diagram of a mechanically driven structure is shown. The valve core 804 is connected to the crankshaft 206 through the connecting rod 103. Under the action of the crankshaft 206, the valve core 804 moves up and down, so as to control the working fluid from the working fluid into the flow channel and into the low temperature chamber. 2 or the high temperature chamber 7, the control working fluid flows out of the low temperature chamber 2 or the high temperature chamber 7 from the working fluid outflow channel 501 of the heat exchanger.

Embodiment 12

An operation method of a regenerative device: when the working fluid flows from the regenerator 4 into the high temperature chamber 7, the first control valve 81 on the flow channel of the high temperature heat exchanger 5 is controlled to remain closed, and the first working medium flows into the flow channel 61. The second control valve 82 on the regenerator is kept open; when the flow of the working fluid from the regenerator 4 to the high temperature chamber 7 is about to end or the flow of the working fluid from the high temperature chamber 7 to the regenerator 4 has just begun, control the first control valve on the flow channel of the high temperature heat exchanger 5 The first control valve 81 starts to open, and the second control valve 82 on the first working medium flows into the flow channel 61 begins to close; At the beginning of 7, the first control valve 81 on the flow channel of the control high temperature heat exchanger 5 starts to close, and the second control valve 82 on the flow channel 61 for the inflow of the first working medium starts to open.

When the working fluid flows into the low temperature chamber 2 from the regenerator 4, the fourth control valve 84 on the flow passage of the low temperature heat exchanger 3 is controlled to remain closed, and the third control valve 83 on the flow passage 62 of the second working fluid flows into the open state. ; When the working fluid from the regenerator 4 flows into the low temperature chamber 2 is about to end or the working fluid flows from the low temperature chamber 2 to the regenerator 4, the fourth control valve 84 on the flow channel of the control low temperature heat exchanger 3 starts to open, and the second The third control valve 83 on the mass inflow channel 62 begins to close; when the flow of the working medium from the low-temperature chamber 2 to the regenerator 4 is about to end or the flow of the working medium from the regenerator 4 to the low-temperature chamber 2 begins, the control of the low-temperature heat exchanger 3 The fourth control valve 84 on the flow channel begins to close, and the third control valve 83 on which the second working medium flows into the flow channel 62 begins to open.

Therefore, the operating method of the present invention requires that no less than 50% of the total working fluid flowing out of the low temperature chamber 2 or the high temperature chamber 7 flows out through the low temperature heat exchanger 3 or the high temperature heat exchanger 5; No more than 50% of the total working fluid in the high temperature chamber 7 flows through the low temperature heat exchanger 3 or the high temperature heat exchanger 5 . Preferably, the ratio of the working medium flowing into the low temperature cavity 2 and the high temperature cavity 7 through the first working medium inflow channel 61 and the second working medium inflow channel 62 is between 0.8 and 1, and the first working medium flowing into the flow channel 61. The ratio of the second working medium flowing into the flow channel 62 and flowing out of the low temperature chamber 2 and the high temperature chamber 7 respectively is between 0 and 0.2. In this operating method, through the first working medium flowing into the flow channel 61 and the second working medium flowing into the flow channel 62, the temperature of the working medium flowing from the regenerator 4 into the low temperature chamber 2 or the high temperature chamber 7 is close to the temperature of the regenerator outlet, and It is not the temperature at the end of the low temperature chamber of the low temperature heat exchanger 3 or the temperature at the end of the high temperature chamber of the high temperature heat exchanger 5, so that the temperature glide can absorb or release heat and achieve high efficiency.

Further, the opening or closing of each control valve for the inflow/outflow of the working medium is completed within ±60° before and after the inflection point of the working medium from the inflow cavity to the outflow cavity or the outflow cavity to the inflow cavity, and one cycle is 0 to 360. °. It should be pointed out that during the closing and opening process of the first control valve 81 , the second control valve 82 , the third control valve 83 and the fourth control valve 84 , due to the time required for complete closing and opening or in order to reduce oscillation, there may be Simultaneous-on state for a short time, furthermore, continuous simultaneous-on state duration <60°.

Further, (1) the minimum refrigeration temperature in the low temperature heat exchanger 3 can be adjusted by adjusting the inlet temperature of the heat transfer medium in the low temperature heat exchanger 3, and the high temperature can be adjusted by adjusting the inlet temperature of the heat transfer medium in the high temperature heat exchanger 5. The maximum heating temperature in the heat exchanger 5, such as reducing the inlet temperature of the heat transfer medium in the low temperature heat exchanger 3, can reduce the minimum cooling temperature in the low temperature heat exchanger 3, and increase the inlet temperature of the heat transfer medium in the high temperature heat exchanger 5. The temperature can increase the maximum heating temperature in the high temperature heat exchanger 5; (2) by adjusting the cycle compression ratio, the minimum cooling temperature in the low temperature heat exchanger 3 and the maximum heating temperature in the high temperature heat exchanger 5 can be adjusted. The large cycle compression ratio can reduce the minimum cooling temperature in the low temperature heat exchanger 3 and increase the maximum heating temperature in the high temperature heat exchanger 5 . The method for adjusting the cyclic compression ratio includes adjusting the dead volume adjusting mechanism, adjusting the stroke of the piston 101, adjusting the phase difference between the piston 101 and the ejector 12, or adjusting the pressure wave effector 10, etc.; (3) adjusting the mass flow rate of the heat transfer medium by controlling The device (for example, controlling the frequency of a variable frequency pump or variable frequency fan, or controlling the opening of an adjustable valve) can adjust the minimum cooling temperature in the low-temperature heat exchanger 3 and the maximum heating temperature in the high-temperature heat exchanger 5, such as Increasing the frequency of the variable frequency fluid machine and increasing the mass flow of the heat transfer medium can increase the minimum cooling temperature in the low temperature heat exchanger 3 and reduce the maximum heating temperature in the high temperature heat exchanger 5 . In addition, by adjusting the mass flow adjustment device of the heat transfer medium to make the mass flow of the heat transfer medium reach a certain range, the low temperature heat exchanger 3 or the high temperature heat exchanger 5 can be changed into a traditional isothermal heat exchange, that is, the heat transfer medium is in The temperature difference between the inlet and outlet of the low temperature heat exchanger 3 or the high temperature heat exchanger 5 is very small, for example, less than 5°C.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent implementation of equivalent changes. example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention should fall within the protection scope of the technical solutions of the present invention.

Claims (18)

1. A regenerative device comprising a regenerative unit comprising a low temperature cavity (2), a low temperature heat exchanger (3), a high temperature heat exchanger (5) and a high temperature cavity ( 7), a pressure wave action device (10) is arranged in the low temperature chamber (2) or the high temperature chamber (7), and the cold working medium of the low temperature chamber (2) flows out through the low temperature heat exchanger (3), The hot working medium of the high temperature chamber (7) flows out through the high temperature heat exchanger (5), and it is characterized in that: the regenerative unit further comprises a first working fluid parallel to the high temperature heat exchanger (5). The mass flows into the flow channel (61), and the cold working medium from the low temperature heat exchanger (3) flows into the high temperature cavity (7) through the first working medium flow channel (61); Or, the regenerative unit further comprises a second working fluid inflow channel (62) parallel to the low temperature heat exchanger (3), and the hot working fluid from the high temperature heat exchanger (5) passes through the The second working medium flows into the flow channel (62) and flows into the low temperature chamber (2); Or, the regenerative unit further comprises a first working fluid inflow channel (61) parallel to the high temperature heat exchanger (5), and a second working fluid parallel to the low temperature heat exchanger (3) into the flow channel (62), the cold working fluid from the low temperature heat exchanger (3) flows into the high temperature cavity (7) through the first working fluid flow channel (61), and the high temperature heat exchanger ( 5) The hot working medium flows into the low temperature cavity (2) through the second working medium inflow channel (62). 2. The regenerative device according to claim 1, characterized in that: a regenerator (4) is arranged between the low temperature heat exchanger (3) and the high temperature heat exchanger (5); the One end of the first working medium inflow channel (61) is connected to one end of the regenerator (4), the other end of the first working medium inflow channel (61) is connected to the high temperature chamber (7), and/or the One end of the second working medium inflow channel (62) is connected to the other end of the regenerator (4), and the other end of the second working medium inflow channel (62) is connected to the low temperature chamber (2). 3. The regenerative device according to claim 2, characterized in that: an ejector (12) is arranged in the low temperature chamber (2), and the pressure wave applicator (10) comprises a piston (101), so The maximum scavenging volume of the piston (101) is 0.1 to 100 times the maximum scavenging volume of the ejector (12). 4. The regenerative device according to claim 3, characterized in that: the inner surface of the high temperature chamber (7), the inner surface of the low temperature chamber (2), the surface of the piston (101), and /or the surface of the ejector (12) is provided with a heat transfer layer (13). 5. The regenerative device according to claim 3, characterized in that: the regenerative unit is provided with a plurality of, and the pistons (101) of the plurality of regenerative units share a crankshaft (206). ); Or, the ejectors (12) of a plurality of the regenerative units share a crankshaft (206); Or, the pistons (101) and the ejectors (12) of the plurality of recuperative units share one crankshaft (206). 6. The regenerative device according to claim 2, characterized in that: a first control valve (81) is provided on the flow channel of the high temperature heat exchanger (5), and the first working medium flows into the flow channel ( 61) is provided with a second control valve (82); and/or a fourth control valve (84) is provided on the flow channel of the low-temperature heat exchanger (3), and the second working medium flows into the flow channel (62) There is a third control valve (83) on it. 7. The regenerative device according to claim 6, characterized in that: the high temperature heat exchanger (5) has a heat exchanger working fluid outflow channel (501), and the first working fluid flows into the flow channel (501). 61) Embedded between the heat exchanger working fluid outflow channel (501), the first control valve (81) and the second control valve (82) form a control valve (8), and the control valve (8) has a valve hole (801) and valve plate (802); And/or the low-temperature heat exchanger (3) has a heat exchanger working fluid outflow channel (501), and the second working fluid inflow channel (62) is embedded in the heat exchanger working fluid outflow channel (501). ), the third control valve (83) and the fourth control valve (84) constitute a control valve (8), and the control valve (8) is provided with a valve hole (801) and a valve plate (802). 8. The regenerative device according to claim 2, characterized in that: a heat transfer medium flow channel (502) and a heat transfer medium inlet are provided on the heat exchanger wall (503) of the high temperature heat exchanger (5) (115) is located at one end close to the regenerator (4), the heat transfer medium outlet (116) is located at one end close to the high temperature cavity (7); and/or the heat exchanger wall (503) of the low temperature heat exchanger (3) ) has a heat transfer medium flow channel (502), the heat transfer medium inlet (115) is located at one end close to the regenerator (4), and the heat transfer medium outlet (116) is located at one end close to the low temperature cavity (2). 9 . The regenerative device according to claim 8 , wherein the heat transfer medium flow channel ( 502 ) is in a spiral shape. 10 . 10. The regenerative device according to claim 8, wherein the regenerative unit further comprises a heat transfer medium mass flow adjustment device. 11. The regenerative device according to claim 2, characterized in that: a first temperature equalizer (111) is arranged between the high temperature heat exchanger (5) and the high temperature cavity (7); Or, the end of the heat exchanger wall (503) of the high temperature heat exchanger (5) close to the high temperature cavity (7) is provided with an elongated section to form the first temperature equalizer (111); Or, a second temperature equalizer (112) is arranged between the low temperature heat exchanger (3) and the low temperature cavity (2); Or, the end of the heat exchanger wall (503) of the low temperature heat exchanger (3) close to the low temperature cavity (2) is provided with an elongated section to form a second temperature equalizer (112); Or, a first temperature equalizer (111) is arranged between the high temperature heat exchanger (5) and the high temperature cavity (7), and the low temperature heat exchanger (3) and the low temperature cavity (2) are connected A second thermostat (112) is arranged between the two; Or, a first temperature equalizer (111) is arranged between the high temperature heat exchanger (5) and the high temperature cavity (7), and the heat exchanger wall (503) of the low temperature heat exchanger (3) is close to the low temperature cavity One end of (2) is provided with an elongated section to form a second temperature equalizer (112); Or, the end of the heat exchanger wall (503) of the high temperature heat exchanger (5) close to the high temperature cavity (7) is provided with an elongated section to form a first temperature equalizer (111) and the low temperature heat exchanger (3) ) and the low temperature chamber (2) is provided with a second temperature equalizer (112); Or, the end of the heat exchanger wall (503) of the high temperature heat exchanger (5) close to the high temperature cavity (7) is provided with an elongated section to form the first temperature equalizer (111) and the low temperature heat exchanger (3) The end of the heat exchanger wall (503) close to the low temperature chamber (2) is provided with an elongated section to form a second temperature equalizer (112). 12. The regenerative device according to claim 2, wherein the regenerative unit further comprises a cyclic compression ratio adjustment mechanism. 13. The regenerative device according to claim 2, characterized in that: the end of the regenerator (4) close to the high temperature heat exchanger (5) is provided with a first rectifier (91); and/or A second rectifier (92) is provided at one end of the regenerator (4) close to the low temperature heat exchanger (3). 14. The regenerative device according to claim 2, wherein the low temperature chamber (2) or the high temperature chamber (7) is provided with an approximately isothermal heat exchange structure, and the approximately isothermal heat exchange structure comprises: A liquid separator (15), a liquid cooler (14), an adsorber (16), and a liquid-spraying component for mixing liquid and working medium, the inlet of the liquid separator (15) is connected to the low-temperature chamber ( 2) or the high temperature chamber (7), the gas outlet of the liquid separator (15) is connected to the inlet of the adsorber (16), and the liquid outlet of the liquid separator (15) is connected to the liquid cooler ( 14), the outlet of the liquid cooler (14) is connected to the liquid spray component, and the outlet of the adsorber (16) is connected to the low temperature heat exchanger (3) or the high temperature heat exchanger (5) ; Or, the approximately isothermal heat exchange structure includes a plurality of partition plates (201) evenly arranged along the circumferential direction of the low temperature cavity (2) or the high temperature cavity (7) and a concave hole for avoiding each partition plate (201). a groove (202), a separation cavity is formed between two adjacent partition plates (201), and the adjacent separation cavities are communicated through a flow channel; Or, the approximately isothermal heat exchange structure includes an accommodating cavity (203) and a rotating body (204) disposed in the accommodating cavity (203), and the inlet and outlet of the accommodating cavity (203) are connected to the low temperature cavity (203). ) or the high temperature chamber (7). 15. The regenerative device according to claim 2, characterized in that: the high temperature heat exchanger (5) is connected with a first heat exchange component (171), and the first heat exchange component (171) is connected to the There is a circulating heat transfer medium between the high temperature heat exchangers (5); Or, the low temperature heat exchanger (3) is connected with a second heat exchange component (172), and there is a circulating heat transfer between the second heat exchange component (172) and the low temperature heat exchanger (3). medium; Or, the high temperature heat exchanger (5) is connected with a first heat exchange component (171), and there is a circulating heat transfer between the first heat exchange component (171) and the high temperature heat exchanger (5). A medium, the low temperature heat exchanger (3) is connected with a second heat exchange component (172), and there is circulating heat transfer between the second heat exchange component (172) and the low temperature heat exchanger (3) medium. 16. The regenerative device according to claim 15, wherein the first heat exchange component (171) and/or the second heat exchange component (172) are connected in series by at least two heat exchange units, wherein : The inlet of the first heat exchange unit is connected to the outlet of the low temperature heat exchanger (3), the outlet of the first heat exchange unit is connected to the inlet of the second heat exchange unit... The outlet of the last heat exchange unit is connected to the outlet of the low temperature heat exchanger (3) connected to the entrance; Or, the inlet of the first heat exchange unit is connected to the outlet of the high temperature heat exchanger (5), the outlet of the first heat exchange unit is connected to the inlet of the second heat exchange unit... The outlet of the last heat exchange unit is connected to the outlet of the high temperature heat exchanger (5). ) connected to the entrance. 17. A method for operating a regenerative device according to any one of claims 2 to 16, characterized in that: When the working medium flows from the regenerator (4) to the high temperature cavity (7), the flow channel between the high temperature heat exchanger (5) and the high temperature cavity (7) is closed, the first working medium flows into the flow channel (61), and the flow channel (61) is opened, The working fluid flows into the high temperature chamber (7) through the regenerator (4) and the first working fluid inflow channel (61) in turn; when the working fluid flows from the high temperature chamber (7) to the regenerator (4), the first working fluid flows into the high temperature chamber (7). The inflow channel (61) is closed, the channel between the high temperature chamber (7) and the high temperature heat exchanger (5) is opened, and the hot working fluid flows to the low temperature chamber through the high temperature heat exchanger (5) and the regenerator (4) in turn (2); Or, when the working medium flows from the low temperature cavity (2) to the regenerator (4), the flow channel between the low temperature cavity (2) and the low temperature heat exchanger (3) is opened, and the second working medium flows into the flow channel (62) closed, the working fluid flows to the high temperature chamber (7) through the low temperature heat exchanger (3) and the regenerator (4) in turn; when the working fluid flows from the regenerator (4) to the low temperature chamber (2), the low temperature heat exchanger ( 3) The flow channel between the low temperature chamber (2) is closed, the second working medium inflow channel (62) is opened, and the hot working medium flows through the regenerator (4) and the second working medium inflow channel (62) in turn. low temperature chamber (2); Or, when the working medium flows from the regenerator (4) to the high temperature cavity (7), the flow channel between the high temperature heat exchanger (5) and the high temperature cavity (7) is closed, and the first working medium flows into the flow channel (61) Open, the working fluid flows through the regenerator (4) and the first working fluid inflow channel (61) into the high temperature chamber (7) in turn; when the working fluid flows from the high temperature chamber (7) to the regenerator (4), the first working fluid flows into the high temperature chamber (7). The working fluid inflow channel (61) is closed, the flow channel between the high temperature cavity (7) and the high temperature heat exchanger (5) is opened, and the hot working fluid flows through the high temperature heat exchanger (5) and the regenerator (4) in turn. Low temperature chamber (2); when the working medium flows from the low temperature chamber (2) to the regenerator (4), the flow channel between the low temperature chamber (2) and the low temperature heat exchanger (3) is opened, and the second working medium flows into the regenerator (4). The passage (62) is closed, and the working fluid flows to the high temperature chamber (7) through the low temperature heat exchanger (3) and the regenerator (4) in turn; when the working fluid flows from the regenerator (4) to the low temperature chamber (2), the low temperature The flow channel between the heat exchanger (3) and the low-temperature cavity (2) is closed, the second working medium flows into the flow channel (62), and the hot working medium flows into the flow channel through the regenerator (4) and the second working medium in turn. (62) flows into the cryogenic chamber (2). 18. The operation method of the regenerative device according to claim 17, characterized in that: it further comprises adjusting the maximum temperature in the low temperature heat exchanger (3) or the maximum temperature in the high temperature heat exchanger (5): adjusting the inlet temperature of the heat transfer medium in the low temperature heat exchanger (3) or the high temperature heat exchanger (5); Or, adjusting the cyclic compression ratio of the regenerative unit; Or, the mass flow rate of the heat transfer medium in the low temperature heat exchanger (3) or the high temperature heat exchanger (5) is adjusted.

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